| 基于信道统计特征的认知无线电协作频谱检测 |
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| 引用本文： | 王莹,岳殿武,王谦,何荣希.基于信道统计特征的认知无线电协作频谱检测[J].电波科学学报,2009,24(6). |
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| 作者姓名： | 王莹 岳殿武 王谦 何荣希 |
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| 作者单位： | 1. 大连海事大学信息科学技术学院,辽宁,大连,116026
2. 大连海事大学信息科学技术学院,辽宁,大连,116026;东南大学移动通信国家重点实验室,江苏,南京,210096 |
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| 基金项目： | 辽宁省教育厅科技研究项目，辽宁省自然科学基金项目，东南大学移动通信国家重点实验室开放研究基金课题 |
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| 摘 要： | 针对认知无线电到融合中心间的控制信道为Nakagami-m衰落信道的情况,研究了认知无线电协作频谱检测问题,推导出融合中心利用衰落信道统计特征的似然比协作频谱检测公式.该方法不需要瞬时信道状态信息,简化了协作频谱检测过程,便于实际应用.通过仿真对融合中心的协作频谱检测性能进行了分析,结果表明:利用衰落信道统计特征的似然比协作频谱检测的性能较利用瞬时信道状态信息的似然比频谱检测性能略有下降,但是在高信噪比或衰落不严重的情况下,二者的性能非常接近,认知无线电节点个数对两种频谱检测方法间的性能差距几乎没有影响.
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| 关 键 词： | 认知无线电 协作频谱检测 似然比 无线衰落信道 |
Channel statistics based cooperative spectrum sensing for cognitive radios |
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| WANG Ying,YUE Dian-wu,WANG Qian,HE Rong-xi.Channel statistics based cooperative spectrum sensing for cognitive radios[J].Chinese Journal of Radio Science,2009,24(6). |
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| Authors: | WANG Ying YUE Dian-wu WANG Qian HE Rong-xi |
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| Affiliation: | WANG Ying1 YUE Dian-wu1,2 WANG Qian1 HE Rong-xi1 (1.College of Information Science , Technology,Dalian Maritime University,Dalian Liaoning 116026,China,2. National Mobile Communications Research Laboratory,Southeast University,Nanjing Jiangsu 210096,China) |
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| Abstract: | Cooperative spectrum sensing for cognitive radios was studied with the assumption that the control channels between cognitive radios and the fusion center are Nakagami-m fading channels. The likelihood ratio test equation with the knowledge of the channel statistics was derived. With this method,the fusion center can perform cooperative spectrum sensing without the instantaneous channel state information,and the spectrum sensing process is simplified and more suitable for practical applications. The perform... |
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| Keywords: | cognitive radio cooperative spectrum sensing likelihood ratio test wireless fading channel |
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